The structure of the axial flow pump

a, the structure of the axial flow pump

axial flow pump factory according to the structure can be divided into vertical, horizontal and diagonal type 3 kinds. Mainly used in the water supply and drainage engineering plastic magnetic pump. Fallopian tube, in order to improve the impeller inlet hydraulic conditions, generally USES in conformity with the streamlined fallopian tube, large and medium-sized axial flow pump by water flow instead of fallopian tube. The impeller. Is a major part of the axial flow pump impeller, usually by the valley of blades, wheel body, the guide of several parts, such as water cone made from cast iron or cast steel. According to the blade installation Angle is adjustable axial-flow water pump can be divided into the stationary type, half adjustment type and whole adjustment type 3 kinds. Stationary blades and hub of axial flow pump body cast, cannot adjust blade installation Angle. Half an adjustable axial-flow pump blades is fastened with a nut on the wheel body, baseline in the root of the blade, and on the wheel body engraved with several installation Angle of the corresponding line of position. Blade installation Angle is different, the performance of the axial flow pump is different also. In accordance with the requirements of using the blade is installed in a certain position, in use process, according to the need to adjust the blade installation Angle, unloaded, the impeller will loosen nut rotating blades, change the position of the blade positioning pin, make the baseline alignment of the vane wheel Angle of a certain requirement on line, and then put the nut and tighten, packed the impeller. Fully adjustable axial-flow pump can be according to requirement, different flow and head in the case of downtime or non-stop, changing blade installation Angle by oil pressure regulating mechanism, to change the performance of the pump. The fully adjustable axial flow regulating mechanism is more complex, generally used in the large axial flow pump. The guide blade body. Guide vane body by the guide vane, guide vane hub, diffusion tubes, made of cast iron. Guide vane is fixed on the pump housing. The role of the guide blade body is transports the liquid flowing out of the impeller are collected into the water pipe; Eliminate the rotary motion, liquid flowing water pump in the pump shaft direction, and the part of the kinetic energy is converted into pressure energy.

2, the working principle of axial flow pump

the work of the axial flow pump is based on aerodynamic wing lift in theory. The blade and with similar profile in the shape of airplane wings, generally called for the airfoil blade profile, the front end of the airfoil obtuse, back-end sharp, on the surface ( Face) Curvature is small, the surface ( On the back) Curvature. When the impeller rotates in the water, the water flow to speed W and chord ( Connecting wing before and after the endpoint of straight line) Into the flow Angle, divided into two, in the front of the airfoil flow, they through the wing shape of the surface of the upper and lower, and then meet at the end of the wing shape at the same time. Because the surface of the short path, path length under the surface, along the flow velocity on the surface of the airfoil under than along airfoil, surface flow velocity is large, the corresponding on the surface of the airfoil under pressure to smaller than on the surface, thus flow direction downward force on airfoil feet, likewise, wing on water to produce a reaction force, its size and J? Equal and opposite effect on the flow of water, under the action of this force, water along the direction of pump shaft. Impeller rotating non-stop, water was constantly ascension.

the definition of more water pump and what are the common classification.

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